Grape plant named ‘ARRATWENTYFIVE’

ABSTRACT

A new distinct variety of grapevine named ‘ARRATWENTYFIVE’ abundantly forms attractive medium firm and meaty seedless berries with a yellow/green skin coloration; in medium-to-large clusters which display a sweet Muscat flavor. The fruit commonly is ready for harvesting during October in San Joaquin Valley of Central California, U.S.A, and displays good eating qualities as a table grape. The fruit firmness renders the fruit well amenable for handling, shipping, and storage.

Classification: The present invention relates to a new Vitis vinifera Grapevine.

Variety denomination: The new Grapevine has the varietal denomination ‘ARRATWENTYFIVE’.

BACKGROUND OF THE INVENTION

A breeding program was initiated during the late 90's near Bakersfield in San Joaquin Valley of Central California. In 2006, during this breeding program, a new variety of Vitis vinifera was created by deliberate cross breeding of two parent plants by emasculation of the pollen bearing organ of the female and introducing pollen from another male origin. The female parent of the new variety was the GAT3 which is a medium-sized creamy white very productive grape variety with a juicy and meaty texture (non-patented in the United States). The male parent (i.e. the pollen parent) of the new variety was GVZ6 which is a large, red and crunchy seedless grape variety with good fertility (non-patented in the United States).

Table 1 Comparison of ‘ARRATWENTYFIVE’ with its parents:

GAT3 GVZ6 Thomson Seedless ARRATWENTYFIVE (Mother) (Father) (Comparison Variety) Berry size 0.86″ 0.7″ 0.94″ 0.7″ Berry shape Cylindrical Ovoid Globose Oblong Bunches per vine 36-42 32 36 30 Fertility High High Good Low

The parentage of the new variety can be summarized as follows: GAT3×GVZ6

An artificial pollination was created, and the result was an embryo which possessed unique genetic qualities. The rudiments resulting from the above pollination were embryo rescued.

In 2007 the plant was transplanted to Bakersfield in San Joaquin Valley of Central California.

It was found that the new grapevine of the present invention possesses the following combination of the characteristics:

-   -   (a) Forms attractive medium firm & meaty seedless berries with a         yellow\green skin coloration; in medium-to-large clusters which         display a sweet Muscat flavor,     -   (b) Commonly bears fruit during the month of October in the San         Joaquin Valley of Central California, U.S.A., and     -   (c) Bears fruit that is firm and is well amenable for storage,         handling, and shipping.

The new variety during observation to date has displayed no visible disease, and has displayed an ability to well resist cold, drought, heat; but sensitive to direct exposure to sun and wind. The fruit of the new variety has been found to display excellent handling and shipping qualities combined with desirable dessert eating qualities.

The new variety of the present invention has been found to undergo asexual propagation beginning in 2009 near Bakersfield in the San Joaquin Valley of Central California, U.S.A. by grafting on mature Thompson rootstock (non-patented in the United States). Such asexual propagation has been conducted thereafter in successive years through 2010, and has shown that the characteristics of the new variety are strictly transmissible from one generation to another. Accordingly, the new variety undergoes asexual propagation in a true to type manner.

SUMMARY OF THE INVENTION

The new variety ‘ARRATWENTYFIVE’ is a medium size, yellow/green seedless table grape with a high production, e.g., about 36-42 bunches per vine, and an average of about one to two bunches per shoot.

Asexual reproduction by micro propagation of the new variety as performed near Bakersfield, Calif., U.S.A., shows that the forgoing and other distinguishing characteristics come true to form and are established and transmitted through succeeding propagations.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying photographic illustration shows typical specimens of vegetative growth of six year old specimens of the new variety, in color as nearly true as it is reasonably possible to make in a color illustration of this character. Colors in the photograph may differ from the color values cited in the detailed botanical description below, which accurately describes the colors of the new Grapevine.

FIG. 1 shows leaves, stems and grapes of ‘ARRATWENTYFIVE’.

DETAILED BOTANICAL DESCRIPTION

The chart used in the identification of colors is The R.H.S. Colour Chart of The ROYAL HORTICULTURAL SOCIETY 1995 edition. The description is based on the observation of plants growing on ‘Thompson Seedless’ rootstock outdoors near San Joaquin Valley of Central California, U.S.A.

-   Vine:     -   -   Vigor.—Vigorous upright shoots.         -   Productive capacity.—Bearing at a natural, average capacity.             Spur pruning.         -   Trunk.—Strong and developed. Ranges from 2″-2⅜″. Rough with             a fibrous, shaggy exterior. Light maple brown coloring. -   Time of bud burst:     -   -   Late.—Mar. 1, 2013 in Bakersfield, Calif. -   Young shoot:     -   -   Openness of tip.—Fully open.         -   Prostrate hairs on tip.—Absent or very sparse.         -   Anthocyanin coloration of prostate hairs on tip.—Absent or             very weak.         -   Erect hairs on tip.—Absent or very sparse. -   Young leaf:     -   -   Color of upper side of blade.—Green (yellow-green 144-A).         -   Prostrate hairs between main veins on lower side of             blade.—Absent or very sparse.         -   Erect hairs on main veins on lower side of blade.—Absent or             very sparse. -   Shoot:     -   -   Attitude (before tying).—Semi-erect.         -   Color of dorsal side of internodes.—Green (yellow-green             144-B).         -   Color of ventral side of internodes.—Green (yellow-green             145-A).         -   Color of dorsal side of nodes.—Green.         -   Color of ventral side of nodes.—Green.         -   Erect hairs on internode.—Absent or very sparse.         -   Length of tendrils.—Long (9″).         -   Color of tendrils.—Yellow-green (144-C).         -   Number of tendrils.—6 at bloom. -   Flower:     -   -   Sexual organs.—Fully developed stamens and fully developed             gynoecium. -   Mature leaf:     -   -   Size of blade.—Very large (8″×8.5″.         -   Shape of blade.—Circular.         -   Blistering of upper side of blade.—Medium.         -   Number of lobes.—Five.         -   Depth of upper lateral sinuses.—Deep.         -   Arrangement of lobes of upper lateral sinuses(only varieties             with lobed leaves).—Slightly overlapped.         -   Arrangement of lobes petiole sinus.—Wide open.         -   Length of teeth.—Long.         -   Ratio length/width of teeth.—Large.         -   Shape of teeth.—Both sides straight.         -   Proportion of main veins on upper side of blade with             anthocyanin coloration.—Medium.         -   Prostrate hairs between main veins on lower side of             blade.—Absent or very sparse.         -   Erect hairs on main veins on lower side of blade.—Absent or             very sparse.         -   Length of petiole compared to length of middle vein.—Much             shorter.         -   Top side color.—Green (137-A).         -   Bottom side color.—Yellow Green (146-C).         -   Texture.—Smooth.         -   Vein color.—Yellow Green (144-B).         -   Petiole length.—6.5″.         -   Petiole color.—Yellow Green (144-B). -   Reproductive organs:     -   -   Color.—Green (137-B).         -   Size.—0.003200″. -   Time of beginning of ripening:     -   -   Late.—Oct. 5, 2013 in Bakersfield, Calif. -   Bunch:     -   -   Size (penduncle excluded).—Large.         -   Density.—Medium.         -   Length of penduncle primary bunch.—Medium.         -   Average bunch weight.—1.25 lbs. -   Berry:     -   -   Size.—Medium.         -   Length.—1.8″.         -   Shape.—Cylindrical.         -   Diameter.— 13/14″.         -   Weight.—0.35 oz.         -   Color of skin (without bloom).—Yellow green.         -   Ease of detachment from pedicle.—Moderately easy.         -   Thickness of skin.—Medium.         -   Anthocyanin coloration of flesh.—Weak.         -   Firmness of flesh.—Soft or slightly firm.         -   Particular flavor.—Muscat.         -   Formation of seeds.—None.         -   Market use of observed plant.—Fresh market.         -   Berries per bunch.—80-100 berries. -   Woody shoot:     -   -   Main color.—Orange brown (grayed orange 164-A). -   Age and growing conditions: Six years growing under Y system in     South Joaquin Valley (hot, dry summers). -   Shipping characteristics: (E.g. number of days fruit has been stored     under specific conditions):     -   -   Fruit was in cold storage.—Stored in poly bags inside             Styrofoam boxes with sulphur pads.         -   After 60 days.—Rachises were 60% green; 5% berry shuttering;             no berry wrinkling or cracks were apparent. -   DNA Profile: To further the characterize the new Arra variety DNA     was extracted from dried leaf samples and DNA profiles were obtained     at California Seed & Plant Lab, California USA using base pairs for     8 standard microsatellite DNA markers. The data is presented     hereafter.

Table 2

Microsatellite DNA Marker Allele Sizes in Base Pairs M1 226 228 M2 239 239 M3 179 194 M4 204 212 M5 273 273 M6 149 149 M7 189 189 M8 247 255 The ‘ARRATWENTYFIVE’ variety has not been observed under all possible environmental conditions to date. Accordingly, it is possible that the phenotypic expression may vary somewhat with changes in light intensity and duration, cultural practices, and other environmental conditions. 

What is claimed is:
 1. A new and distinct variety of grapevine, botanically known as Vitis vinifera, identified as ‘ARRATWENTYFIVE’, substantially as shown and described herein. 